Name	Info	Provider	Link
	free resource	Medknow Publications and Media Pvt Ltd	http://www.surgicalneurologyint.com/article.asp?issn=2152-7806;year=2015;volume=6;issue=1;spage=6;epage=6;aulast=Li
	free resource	PubMed Central	https://www.ncbi.nlm.nih.gov/pmc/articles/pmid/25657859/
	free resource	Europe PubMed Central	https://europepmc.org/abstract/MED/25657859
	free resource	scite Smart Citations	https://scite.ai/reports/25657859